Nutrients commonly taken for hair growth, hair loss, skin and nails — such as biotin, collagen, iron and vitamin D (low iron and vitamin D are linked to hair shedding), plus the "beauty from within" actives (hyaluronic acid, silica, keratin) whose evidence we report honestly. Ranked by cost per dose. Not medical advice. Best value right now: Iron from $0.01/serving.
Prices checked Oct 10, 2026
The nutrients people commonly associate with hair growth, skin & nails, each shown at its cheapest current cost per dose (per gram for powders). Ranked lowest cost first; no paid placement.
| # | Nutrient | Cheapest pick | Dose basis | Price | Cost / dose | Refs |
|---|---|---|---|---|---|---|
| 1 | Iron | Ferrous Sulfate 325 mg Tablets, 1000 Count | per serving | $13.60 | $0.01/serving | facts · NIH |
| 2 | Vitamin D3 | Micro Ingredients Vitamin D3 5,000 IU | per serving | $9.99 | $0.02/serving | facts · NIH |
| 3 | Zinc | 21st Century Zinc Citrate 50mg Tablets | per serving | $8.49 | $0.02/serving | facts · NIH |
| 4 | Vitamin C | Bronson Vitamin C 500 MG Supports a Healthy… | per serving | $9.99 | $0.04/serving | facts · NIH |
| 5 | Hyaluronic Acid | NatureBell 2 Pack Plant Based Hyaluronic Acid… | per serving | $38.95 | $0.04/serving | facts · NIH |
| 6 | Collagen Peptides | Micro Ingredients 2 Pack Multi Collagen Pills… | per serving | $39.99 | $0.04/serving | facts |
| 7 | Astaxanthin | Xaarty 3Pack Premium Astaxanthin 12mg | per serving | $49.99 | $0.05/serving | facts |
| 8 | Keratin | BulkSupplements.com Hydrolyzed Keratin Powder… | per serving | $30.97 | $0.06/serving | facts · NIH |
| 9 | Silica | Multi Collagen Pills for Women & Men… | per serving | $21.99 | $0.07/serving | facts · NIH |
Ranked by real cost per dose (per gram for powders), not sticker price. We make no health claims — see each linked nutrient page for NIH-sourced facts, or read our methodology.
This page gathers the nutrients people commonly associate with hair growth, skin & nails and ranks each one by cost per dose — the product’s current price divided by its servings per container, then normalized to one daily dose (or per gram for powders so a 20 g and a 25 g serving compare fairly). The table shows the single cheapest pick we currently track for each nutrient, sorted lowest cost first. Nothing here is paid placement, and a nutrient with no active deals simply drops off the list.
If you are assembling a stack for hair growth, skin & nails, cost per dose is the figure that tells you what each option actually costs to take day after day — a smaller bottle with a lower sticker price can cost more per serving than a larger one. Use it to compare like-for-like and avoid overpaying; it is a price-comparison signal, not a measure of quality or suitability.
Detailed nutrient facts — intake ranges, food sources, upper limits and safety — live on each linked nutrient hub, sourced from the NIH Office of Dietary Supplements. For the full ranking rules see our methodology and editorial standards.
Commonly: Collagen Peptides, Hyaluronic Acid, Silica, Keratin, Astaxanthin, Iron, Vitamin D3, Vitamin C, Zinc. We make no medical claims — each is ranked here by real cost per dose, with NIH-sourced facts on its nutrient page. Not medical advice.
By cost per dose, Ferrous Sulfate 325 mg Tablets, 1000 Count (Iron) at $0.01/serving is the cheapest per-dose option among the hair growth, skin & nails nutrients we track as of October 2026.
We link primary sources and paraphrase their findings — never copy their text, tables, or images. Cost-per-dose figures are our own first-party catalog data.